/* Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.activiti.engine.impl.persistence.entity;

import java.io.Serializable;
import java.util.HashMap;
import java.util.Map;

import org.activiti.engine.ActivitiException;
import org.activiti.engine.delegate.event.impl.ActivitiEventBuilder;
import org.activiti.engine.impl.context.Context;
import org.activiti.engine.impl.db.BulkDeleteable;
import org.activiti.engine.impl.db.PersistentObject;
import org.flowable.common.engine.api.delegate.event.FlowableEngineEventType;
import org.flowable.common.engine.impl.interceptor.EngineConfigurationConstants;
import org.flowable.identitylink.api.IdentityLink;

/**
 * @author Joram Barrez
 */
public class IdentityLinkEntity implements Serializable, IdentityLink, BulkDeleteable, PersistentObject {

    private static final long serialVersionUID = 1L;

    protected String id;

    protected String type;

    protected String userId;

    protected String groupId;

    protected String taskId;

    protected String processInstanceId;

    protected String processDefId;

    protected TaskEntity task;

    protected ExecutionEntity processInstance;

    protected ProcessDefinitionEntity processDef;

    @Override
    public Object getPersistentState() {
        Map<String, Object> persistentState = new HashMap<>();
        persistentState.put("id", this.id);
        persistentState.put("type", this.type);

        if (this.userId != null) {
            persistentState.put("userId", this.userId);
        }

        if (this.groupId != null) {
            persistentState.put("groupId", this.groupId);
        }

        if (this.taskId != null) {
            persistentState.put("taskId", this.taskId);
        }

        if (this.processInstanceId != null) {
            persistentState.put("processInstanceId", this.processInstanceId);
        }

        if (this.processDefId != null) {
            persistentState.put("processDefId", this.processDefId);
        }

        return persistentState;
    }

    public void insert() {
        Context
                .getCommandContext()
                .getDbSqlSession()
                .insert(this);

        Context.getCommandContext().getHistoryManager()
                .recordIdentityLinkCreated(this);

        if (Context.getProcessEngineConfiguration().getEventDispatcher().isEnabled()) {
            Context.getProcessEngineConfiguration().getEventDispatcher().dispatchEvent(
                    ActivitiEventBuilder.createEntityEvent(FlowableEngineEventType.ENTITY_CREATED, this),
                    EngineConfigurationConstants.KEY_PROCESS_ENGINE_CONFIG);
            Context.getProcessEngineConfiguration().getEventDispatcher().dispatchEvent(
                    ActivitiEventBuilder.createEntityEvent(FlowableEngineEventType.ENTITY_INITIALIZED, this),
                    EngineConfigurationConstants.KEY_PROCESS_ENGINE_CONFIG);
        }
    }

    public boolean isUser() {
        return userId != null;
    }

    public boolean isGroup() {
        return groupId != null;
    }

    @Override
    public String getId() {
        return id;
    }

    @Override
    public void setId(String id) {
        this.id = id;
    }

    @Override
    public String getType() {
        return type;
    }

    public void setType(String type) {
        this.type = type;
    }

    @Override
    public String getUserId() {
        return userId;
    }

    public void setUserId(String userId) {
        if (this.groupId != null && userId != null) {
            throw new ActivitiException("Cannot assign a userId to a task assignment that already has a groupId");
        }
        this.userId = userId;
    }

    @Override
    public String getGroupId() {
        return groupId;
    }

    public void setGroupId(String groupId) {
        if (this.userId != null && groupId != null) {
            throw new ActivitiException("Cannot assign a groupId to a task assignment that already has a userId");
        }
        this.groupId = groupId;
    }

    @Override
    public String getTaskId() {
        return taskId;
    }

    public void setTaskId(String taskId) {
        this.taskId = taskId;
    }

    @Override
    public String getProcessInstanceId() {
        return processInstanceId;
    }

    public void setProcessInstanceId(String processInstanceId) {
        this.processInstanceId = processInstanceId;
    }

    public String getProcessDefId() {
        return processDefId;
    }

    public void setProcessDefId(String processDefId) {
        this.processDefId = processDefId;
    }

    public TaskEntity getTask() {
        if ((task == null) && (taskId != null)) {
            this.task = Context
                    .getCommandContext()
                    .getTaskEntityManager()
                    .findTaskById(taskId);
        }
        return task;
    }

    public void setTask(TaskEntity task) {
        this.task = task;
        this.taskId = task.getId();
    }

    public ExecutionEntity getProcessInstance() {
        if ((processInstance == null) && (processInstanceId != null)) {
            this.processInstance = Context
                    .getCommandContext()
                    .getExecutionEntityManager()
                    .findExecutionById(processInstanceId);
        }
        return processInstance;
    }

    public void setProcessInstance(ExecutionEntity processInstance) {
        this.processInstance = processInstance;
        this.processInstanceId = processInstance.getId();
    }

    public ProcessDefinitionEntity getProcessDef() {
        if ((processDef == null) && (processDefId != null)) {
            this.processDef = Context
                    .getCommandContext()
                    .getProcessDefinitionEntityManager()
                    .findProcessDefinitionById(processDefId);
        }
        return processDef;
    }

    public void setProcessDef(ProcessDefinitionEntity processDef) {
        this.processDef = processDef;
        this.processDefId = processDef.getId();
    }

    @Override
    public String getProcessDefinitionId() {
        return this.processDefId;
    }
    
    @Override
    public String getScopeId() {
        return null;
    }
    
    @Override
    public String getSubScopeId() {
        return null;
    }

    @Override
    public String getScopeType() {
        return null;
    }

    @Override
    public String getScopeDefinitionId() {
        return null;
    }

    @Override
    public String toString() {
        StringBuilder sb = new StringBuilder();
        sb.append("IdentityLinkEntity[id=").append(id);
        sb.append(", type=").append(type);
        if (userId != null) {
            sb.append(", userId=").append(userId);
        }
        if (groupId != null) {
            sb.append(", groupId=").append(groupId);
        }
        if (taskId != null) {
            sb.append(", taskId=").append(taskId);
        }
        if (processInstanceId != null) {
            sb.append(", processInstanceId=").append(processInstanceId);
        }
        if (processDefId != null) {
            sb.append(", processDefId=").append(processDefId);
        }
        sb.append("]");
        return sb.toString();
    }
}
